'CSI' star returns in two-part finale

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Bill Irwin is to reprise his role as Nate Haskell aka The Dick and Jane Killer on the two-part season ten finale of CSI.

Entertainment Weekly reports that the character will assist Dr Langston (Laurence Fishburne) in his season-long pursuit of Dr Jekyll.

"Nate knows who Dr Jekyll is, which is kind of interesting since he's been in prison for the last 11 years," notes executive producer Carol Mendelsohn. "The season finale is all about what it will take to get him to give them a name."

The return of Haskell also marks a bridge between the exit of Dr Grissom and the entrance of Dr Langston in the series.

"It was Nate who pushed Grissom out of the lab and put Langston in back in season nine," added Mendelsohn, who also assured that "blood will be spilled" during the season ender "and it will belong to more than one CSI".